Colombia–Ecuador border, International border between Nariño and Carchi provinces, South America
This international boundary runs 586 kilometers between Colombia and Ecuador, from the Güepí River in the Amazon region to the Mataje River on the Pacific coast. It separates the Colombian department of Nariño from the Ecuadorian province of Carchi, crossing rainforest, highlands and coastal areas with different climates and landscapes.
The Muñoz-Suárez Vernaza Treaty defined the final boundary line between the two countries in 1916, following the collapse of Gran Colombia. The Liévano-Lucio Treaty of 1975 extended the agreement into maritime waters up to 200 nautical miles into the Pacific.
The Rumichaca International Bridge connects the cities of Ipiales and Tulcán, serving as the primary crossing point for commerce and travelers.
Three official crossing points connect both countries: the Rumichaca Bridge near Ipiales for main traffic, San Miguel in the rainforest and San Lorenzo on the coast. Travelers should keep identity documents ready and check locally for waiting times, as traffic volume varies throughout the day.
The eastern section of the boundary runs through nearly uninhabited Amazon rainforest, where only a few locals and researchers cross the remote frontier area. By contrast, thousands of people pass through the Rumichaca Bridge in the highlands daily, making it one of the busiest crossings on the continent.
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